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Fertilize cucumbers: What care and food plants need to get abundant harvest?

Home-grown cucumbers taste great and, depending on the variety, can be grown in a greenhouse or in a warm, sheltered place outdoors. Seeds can be sown indoors or outdoors from spring to early summer, or you can buy seedlings at the garden center. To get abundant harvests, you need to fertilize your cucumbers and care for them regularly. We’ll go over what fertilizers are appropriate and when to use them. For the first time some information about the appropriate conditions for growing cucumbers.

Brief instructions for cultivation

You can fertilize cucumbers with coffee grounds as it is beneficial for the growth of the plants

Plant cucumbers when average daily temperatures are around 20 degrees Celsius. Space the plants 36 to 60 inches apart (12 inches for trellis plants) in an area with plenty of sun and fertile, well-drained soil with a pH of 6.0 to 6.8. For cucumbers grown on a trellis, space the plants 30 inches apart. Cucumbers grow quickly with little care. Make sure they receive an inch of water each week. Insufficient or uneven moisture will result in oddly shaped or poor tasting fruit. If possible, water your plants with a soaker hose or drip irrigation to keep the foliage dry.

Worm dung is one of the best slow release fertilizers for cucumber plants

This will help prevent foliar diseases that can ruin the plant. If you have the opportunity, you should trellis your vines . This will keep the fruit clean and save you space. A cage with a diameter of 30 to 45 cm, made of welded wire fence, can support 2 or 3 vines.

Fertilize cucumbers in the garden

Fertilize cucumbers - what care the vegetable needs, read with us

Feed the plants regularly with a water-soluble plant fertilizer to get the most out of them. If the soil is warm, put down a layer of straw mulch to keep the fruit clean and keep slugs and bugs away. Cucumbers need warm, fertile soil. To improve the soil and create the root environment needed for a bountiful harvest, work a few inches of old compost into the top layer of your existing garden soil. (Compost or composted manure are also suitable). In areas where spring is long and cool, you can warm the soil by 3 to 4 degrees by covering the mound or row with black plastic.

Cucumbers can be grown in a greenhouse or in a warm place outdoors


You can also use pine straw, wheat straw, chopped leaves or your favorite organic mulch shortly after planting. If the weather is unusually cool, you can wait to mulch until the sun has warmed the soil. Mulch is especially important for keeping fruit clean on shrub species and vines that are not growing on a trellis. Straw mulch is also considered unpleasant for slugs and provides an unpleasant substrate for cucumber beetles to keep them at bay.

When to feed the plants

Add energy to your mulch in the form of a little fertilizer

To successfully fertilize cucumbers, you need to feed them at 3 different times and in 3 phases:

  • at planting time
  • when mulching around the plants
  • at 2-week intervals during the development of the plants.

Cucumbers like plenty of sun and fertile soil with a pH of 6.0 to 6.8


Below we will explain each phase of fertilization and how to provide nutrients to your cucumbers for maximum production and health. Fertilizing when planting from seed is one of the 3 most important times to encourage plant growth. Providing young plants with easily absorbed nutrients near their roots helps them get off to a good start. Successful cucumber growing starts with a good start on the day of planting. The best way to do that is to give a boost of nutrients right in the planting hole. How you fertilize depends on whether you are planting seeds or seedlings. When planting seeds, it is important to first mix generous amounts of compost into the soil.

Feed the young plants

Give your plants additional fertilizer after planting

Once the plants are in the ground and established, they need to be fertilized regularly but lightly as they develop. And those two key words, regular and light, make all the difference! If you don’t give your plants extra fertilizer after planting, they probably won’t perform as well as they should. However, if you give them too much, they will only produce foliage and few vegetables.

How much compost to use

Compost is a perfect, natural, balanced slow-release fertilizer

A good rule of thumb is that the planting hole or mound should be 50% soil and 50% compost. Compost is really a perfect, natural, balanced slow-release fertilizer. Not only is it teeming with minerals and beneficial organisms, but it also helps retain moisture in the soil. And that moisture is important for seeds to germinate and grow quickly.

Use worm droppings as food

Use worm manure for an abundant crop and plant health

Worm droppings are one of the best slow-release fertilizers you can use. It is 100 percent organic and slowly but surely releases its power to the plants. Dig your planting holes about three times the size of the root ball. Then fill the hole with a 50/50 mix of soil and compost to provide immediate nutrients to the plants. Want to give the cucumbers an even bigger boost when you plant them? Add a half cup of worm manure to your planting hole. This will give your young plants an incredible start!

Fertilize cucumbers with coffee grounds

A compost pile that contains coffee grounds will help improve soil structure and fertility, benefiting cucumbers. Coffee grounds provide more nitrogen, creating an ideal nitrogen to carbon ratio that is favorable for cucumber growth.

Mulching is a must

Apply a layer of mulch around each plant

Once you’ve planted your plants or the seeds have sprouted in the soil, it’s time to mulch. Mulch not only helps keep weeds under control, but it also helps regulate soil temperature. Both are two important requirements for growing healthy, productive plants. But here’s a little secret that can help your plants even more – add energy to your mulch in the form of a little fertilizer! Apply a 5-inch layer of compost, about 15 inches in diameter, around each plant as your first layer of mulch.

50% compost must be used to ensure you get a good harvest

And while you’re at it, mix a half cup of worm poop into the compost, too! Then apply your regular mulch (straw, shredded leaves, etc.) as usual. This “ring” of compost and worm droppings acts as the ultimate slow-release fertilizer every time you water or rain. The nutrients slowly seep into the soil, giving the plants immediate but balanced power to grow.

Fertilize cucumbers in containers

Since cucumbers are heavy feeders, add an organic slow-release fertilizer to the potting mix when planting. This will provide a steady supply throughout the growing season. In addition, use a diluted liquid fertilizer made from seaweed or compost tea every three to four weeks.

Fertilize cucumbers in the tub - regularly feed the plants with a water-soluble plant fertilizer.